Superadditivity for Remote Sensing and Communication

2. The system of claim 1, wherein the plurality of input pulses comprises N state-prepared and timing-controlled sequential laser pulses, wherein N comprises an integer greater than one.

3. The system of claim 1, wherein the communication channel comprises a noisy and lossy free-space channel.

4. The system of claim 1, wherein the coupling optics comprise a circulator configured to direct the output light of the interaction medium to the detector.

5. The system of claim 1, wherein the output light of the interaction medium comprises quantum bits (qubits) ready for measurement by the detector.

6. The system of claim 1, wherein the interaction medium comprises a cavity including an ion trap configured to produce a plurality of ions to scatter the plurality of input pulses and the probe beam.

7. The system of claim 6, wherein the cavity comprises dielectric mirrors formed by a coating of a low-loss, transparent conductor.

8. The system of claim 7, wherein the cavity comprises a shielded cavity.

9. The system of claim 1, wherein the interaction medium comprises a photonic crystal, and wherein trapped atoms are used to scatter the plurality of input pulses and the probe beam.

10. The system of claim 1, wherein the interaction medium comprises a shielded photonic crystal, and wherein trapped ions are used to scatter the plurality of input pulses and the probe beam.

11. The system of claim 1, wherein the interaction medium comprises superconducting qubits using radiofrequency (RF) state preparation and a state-preparation laser beam.

12. The system of claim 1, wherein the interaction medium comprises a surface magnetic state using an RF state preparation and a state-preparation laser beam.

13. The system of claim 1, wherein the interaction medium comprises a membrane configured to couple the plurality of input pulses and the probe beam to a resonant vibrational mode.

15. The method of claim 14, wherein the interaction medium comprises the cavity including the ion trap, and wherein the method further comprises producing a plurality of ions to absorb the plurality of input pulses and the probe beam.

16. The method of claim 14, wherein the interaction medium comprises the photonic crystal, and wherein the method further comprises cooling and trapping atoms and using the trapped atoms to absorb the plurality of input pulses and the probe beam.

17. The method of claim 14, wherein the interaction medium comprises the membrane, and wherein the method further comprises coupling the plurality of input pulses and the probe beam to a resonant vibrational mode.

18. The method of claim 14, wherein the interaction medium comprises the shielded photonic crystal, and wherein the method further comprises using trapped ions to absorb the plurality of input pulses and the probe beam.

20. The method of claim 19, wherein the plurality of input pulses comprises N state-prepared and timing-controlled sequential laser pulses, N comprises an integer greater than one, and the communication channel comprises a noisy and lossy free-space channel.